All you need to know about the new AY.4.2 lineage of the coronavirus
AY.4 has been steadily growing in proportion in the UK over the last few months
AY.4 has been steadily growing in proportion in the UK over the last few months
AY.4 has been steadily growing in proportion in the UK over the last few months
AY.4 has been steadily growing in proportion in the UK over the last few months